Origin of the Shield Shape in the Solar Folio of the f85-86 Foldout

[oshfdk]

None of the examples shown in post You are not allowed to view links. Register or Login to view. are even close to the Beneventan letters in You are not allowed to view links. Register or Login to view. . 

First, the letters 'V' or 'U' must have a horizontal support underneath with sharp endings. Second, the suprascipt must resemble a sideways 'm' or Arabic numeral '3' but not the letter 'S'.

This is subjective. You say the horizontal support is more important, I say the wavy line is not at all like Arabic 3 or sideways 'm', but does look like vapor coming out of a vial. This exactly shows my point: your interpretation is just as unconvincing to me, as mine is unconvincing to you. Maybe one is true, the other is not, maybe both are false. I don't think there is enough evidence for choosing either of them.

Concerning the red letters on the right-hand side of You are not allowed to view links. Register or Login to view. , I explicitly stated that they can be estimated with less certainty (because parts of the letters are concealed or erased). Several options could be explored and an update will be provided when similar existing writings are found.

If we discard the upper right glyph for now, what do we have left? Two shapes only? Quite different from each other, but both are supposed to be U/V?

Just in case, I'm attaching all three glyphs and also a few somewhat similar small glyphs from the right column of characters on the same folio, this is the clearest version I could find. (All from the same run of a linear regression model, cropped from the same resulting image.)